Well, this took a lot of time... but I'm fairly happy with it. Me and a friend decided to work on two images with completely different media, but with the same inspiration: Doctor Whooves vs Changelings, with Derpy.

By the looks of the Changlings's eyes they seem to relie on hearing and smell to find prey. So boosting the sound should disrupt their navigation... and give them a blistering ear ache. Well done Doctor.

I kind of like the idea of the Doctor meeting the Changelings. Knowing him he would find them interesting, and despite their hostility would want to help them, because he cherishes all life. (Except maybe the Daleks)